Data/hora: 05/06/2024 19:18:32

Provedor de dados: | 5
País: | France
Título: | Etude de la variabilité spatio-temporelle des caractéristiques physiologiques des jeunes stades de vie de la seiche Sepia officinalis L. en Manche.
Autores: | Safi, Georges.
Data: | 2013-05-13
Ano: | 2013
Palavras-chave: | Seiche; Recrutement (biologie); Oeufs--incubation; Enzymes digestives; Protéases; Lysozyme; Écophysiologie; Manche (mer).; Cuttelfish; Recruitment (Population biology); Eggs--incubation; Digestive enzymes; Proteinase; Lysozyme; Ecophysiology; English Channel.
Resumo: | The common cuttlefish Sepia officinalis, is a major exploited marine resource in the English Channel. It has strong seasonal and interannual variations in recruitment. Mechanisms affecting the renewal of the stock by the arrival of new “recruits” and their number need to be better understood. Thus the study of the spatial and temporal variability of “pre-recruits” physiological characteristics was conducted in four spawning sites of the Channel [i.e. Agon Coutainville (FR), Baie de Seine (FR), Selsey (UK) and Torbay (UK)]. The studied parameters were the eggs quality and hatching rate then, the digestive and immune performance of juveniles in relation to local environmental conditions. English eggs have a delayed hatching time and higher hatching rate when compared to the French ones. Temperature and salinity are important in understanding these differences. The digestive performance of hatchlings varied according to the site. The study of immune enzyme activities showed local vulnerabilities of early stages which corresponded to episodes of high mortality. These mortalities are correlated with low protein content and low immune activities in eggs. These results underline how variability in the spatio-temporal characteristics of the early life stages of cuttlefish can influence the contribution of spawning sites to S. officinalis stock in the English Channel.
Tipo: | Text
Idioma: | Francês
Identificador: | http://archimer.ifremer.fr/doc/00161/27232/25439.pdf
Editor: | Université de Caen Basse-Normandie
Relação: | http://archimer.ifremer.fr/doc/00161/27232/
Formato: | application/pdf